Slack
name: slack
by byungkyu · published 2026-03-22
$ claw add gh:byungkyu/byungkyu-slack-api---
name: slack
description: |
Slack API integration with managed OAuth. Send messages, manage channels, search conversations, and interact with Slack workspaces. Use this skill when users want to post messages, list channels, get user info, or automate Slack workflows. For other third party apps, use the api-gateway skill (https://clawhub.ai/byungkyu/api-gateway).
compatibility: Requires network access and valid Maton API key
metadata:
author: maton
version: "1.0"
clawdbot:
emoji:
homepage: "https://maton.ai"
requires:
env:
- MATON_API_KEY
---
# Slack
Access the Slack API with managed OAuth authentication. Send messages, manage channels, list users, and automate Slack workflows.
Quick Start
# Post a message to a channel
python <<'EOF'
import urllib.request, os, json
data = json.dumps({'channel': 'C0123456789', 'text': 'Hello from Maton!'}).encode()
req = urllib.request.Request('https://gateway.maton.ai/slack/api/chat.postMessage', data=data, method='POST')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
req.add_header('Content-Type', 'application/json')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOFBase URL
https://gateway.maton.ai/slack/{method}The gateway proxies requests to `slack.com` and automatically injects your OAuth token.
Authentication
All requests require the Maton API key in the Authorization header:
Authorization: Bearer $MATON_API_KEY**Environment Variable:** Set your API key as `MATON_API_KEY`:
export MATON_API_KEY="YOUR_API_KEY"Getting Your API Key
1. Sign in or create an account at [maton.ai](https://maton.ai)
2. Go to [maton.ai/settings](https://maton.ai/settings)
3. Copy your API key
Connection Management
Manage your Slack OAuth connections at `https://ctrl.maton.ai`.
List Connections
python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://ctrl.maton.ai/connections?app=slack&status=ACTIVE')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOFCreate Connection
python <<'EOF'
import urllib.request, os, json
data = json.dumps({'app': 'slack'}).encode()
req = urllib.request.Request('https://ctrl.maton.ai/connections', data=data, method='POST')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
req.add_header('Content-Type', 'application/json')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOFGet Connection
python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://ctrl.maton.ai/connections/{connection_id}')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF**Response:**
{
"connection": {
"connection_id": "21fd90f9-5935-43cd-b6c8-bde9d915ca80",
"status": "ACTIVE",
"creation_time": "2025-12-08T07:20:53.488460Z",
"last_updated_time": "2026-01-31T20:03:32.593153Z",
"url": "https://connect.maton.ai/?session_token=...",
"app": "slack",
"metadata": {}
}
}Open the returned `url` in a browser to complete OAuth authorization.
Delete Connection
python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://ctrl.maton.ai/connections/{connection_id}', method='DELETE')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOFSpecifying Connection
If you have multiple Slack connections, specify which one to use with the `Maton-Connection` header:
python <<'EOF'
import urllib.request, os, json
data = json.dumps({'channel': 'C0123456789', 'text': 'Hello!'}).encode()
req = urllib.request.Request('https://gateway.maton.ai/slack/api/chat.postMessage', data=data, method='POST')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
req.add_header('Maton-Connection', '21fd90f9-5935-43cd-b6c8-bde9d915ca80')
req.add_header('Content-Type', 'application/json')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOFIf omitted, the gateway uses the default (oldest) active connection.
---
API Reference
Authentication
#### Auth Test
GET /slack/api/auth.testReturns current user and team info.
---
Messages
#### Post Message
POST /slack/api/chat.postMessage
Content-Type: application/json
{
"channel": "C0123456789",
"text": "Hello, world!"
}With blocks:
POST /slack/api/chat.postMessage
Content-Type: application/json
{
"channel": "C0123456789",
"blocks": [
{"type": "section", "text": {"type": "mrkdwn", "text": "*Bold* and _italic_"}}
]
}#### Post Thread Reply
POST /slack/api/chat.postMessage
Content-Type: application/json
{
"channel": "C0123456789",
"thread_ts": "1234567890.123456",
"text": "This is a reply in a thread"
}#### Update Message
POST /slack/api/chat.update
Content-Type: application/json
{
"channel": "C0123456789",
"ts": "1234567890.123456",
"text": "Updated message"
}#### Delete Message
POST /slack/api/chat.delete
Content-Type: application/json
{
"channel": "C0123456789",
"ts": "1234567890.123456"
}#### Schedule Message
POST /slack/api/chat.scheduleMessage
Content-Type: application/json
{
"channel": "C0123456789",
"text": "Scheduled message",
"post_at": 1734567890
}#### List Scheduled Messages
GET /slack/api/chat.scheduledMessages.list#### Delete Scheduled Message
POST /slack/api/chat.deleteScheduledMessage
Content-Type: application/json
{
"channel": "C0123456789",
"scheduled_message_id": "Q1234567890"
}#### Get Permalink
GET /slack/api/chat.getPermalink?channel=C0123456789&message_ts=1234567890.123456---
Conversations (Channels)
#### List Channels
GET /slack/api/conversations.list?types=public_channel,private_channel&limit=100Types: `public_channel`, `private_channel`, `im`, `mpim`
#### Get Channel Info
GET /slack/api/conversations.info?channel=C0123456789#### Get Channel History
GET /slack/api/conversations.history?channel=C0123456789&limit=100With time range:
GET /slack/api/conversations.history?channel=C0123456789&oldest=1234567890&latest=1234567899#### Get Thread Replies
GET /slack/api/conversations.replies?channel=C0123456789&ts=1234567890.123456#### Get Channel Members
GET /slack/api/conversations.members?channel=C0123456789&limit=100#### Create Channel
POST /slack/api/conversations.create
Content-Type: application/json
{
"name": "new-channel-name",
"is_private": false
}#### Join Channel
POST /slack/api/conversations.join
Content-Type: application/json
{
"channel": "C0123456789"
}#### Leave Channel
POST /slack/api/conversations.leave
Content-Type: application/json
{
"channel": "C0123456789"
}#### Archive Channel
POST /slack/api/conversations.archive
Content-Type: application/json
{
"channel": "C0123456789"
}#### Unarchive Channel
POST /slack/api/conversations.unarchive
Content-Type: application/json
{
"channel": "C0123456789"
}#### Rename Channel
POST /slack/api/conversations.rename
Content-Type: application/json
{
"channel": "C0123456789",
"name": "new-name"
}#### Set Channel Topic
POST /slack/api/conversations.setTopic
Content-Type: application/json
{
"channel": "C0123456789",
"topic": "Channel topic here"
}#### Set Channel Purpose
POST /slack/api/conversations.setPurpose
Content-Type: application/json
{
"channel": "C0123456789",
"purpose": "Channel purpose here"
}#### Invite to Channel
POST /slack/api/conversations.invite
Content-Type: application/json
{
"channel": "C0123456789",
"users": "U0123456789,U9876543210"
}#### Kick from Channel
POST /slack/api/conversations.kick
Content-Type: application/json
{
"channel": "C0123456789",
"user": "U0123456789"
}#### Mark Channel Read
POST /slack/api/conversations.mark
Content-Type: application/json
{
"channel": "C0123456789",
"ts": "1234567890.123456"
}---
Direct Messages
#### Open DM Conversation
POST /slack/api/conversations.open
Content-Type: application/json
{
"users": "U0123456789"
}For group DM:
POST /slack/api/conversations.open
Content-Type: application/json
{
"users": "U0123456789,U9876543210"
}#### List DM Channels
GET /slack/api/conversations.list?types=im#### List Group DM Channels
GET /slack/api/conversations.list?types=mpim#### My Conversations
GET /slack/api/users.conversations?limit=100---
Users
#### List Users
GET /slack/api/users.list?limit=100#### Get User Info
GET /slack/api/users.info?user=U0123456789#### Get User Presence
GET /slack/api/users.getPresence?user=U0123456789#### Set User Presence
POST /slack/api/users.setPresence
Content-Type: application/json
{
"presence": "away"
}#### Lookup User by Email
GET /slack/api/users.lookupByEmail?email=user@example.com---
Reactions
#### Add Reaction
POST /slack/api/reactions.add
Content-Type: application/json
{
"channel": "C0123456789",
"name": "thumbsup",
"timestamp": "1234567890.123456"
}#### Remove Reaction
POST /slack/api/reactions.remove
Content-Type: application/json
{
"channel": "C0123456789",
"name": "thumbsup",
"timestamp": "1234567890.123456"
}#### Get Reactions on Message
GET /slack/api/reactions.get?channel=C0123456789×tamp=1234567890.123456#### List My Reactions
GET /slack/api/reactions.list?limit=100---
Stars
#### List Stars
GET /slack/api/stars.list?limit=100#### Add Star
POST /slack/api/stars.add
Content-Type: application/json
{
"channel": "C0123456789",
"timestamp": "1234567890.123456"
}#### Remove Star
POST /slack/api/stars.remove
Content-Type: application/json
{
"channel": "C0123456789",
"timestamp": "1234567890.123456"
}---
Bots
#### Get Bot Info
GET /slack/api/bots.info?bot=B0123456789---
Files
#### Upload File
POST /slack/api/files.upload
Content-Type: multipart/form-data
channels=C0123456789
content=file content here
filename=example.txt
title=Example File#### Upload File v2 (Get Upload URL)
GET /slack/api/files.getUploadURLExternal?filename=example.txt&length=1024#### Complete File Upload
POST /slack/api/files.completeUploadExternal
Content-Type: application/json
{
"files": [{"id": "F0123456789", "title": "My File"}],
"channel_id": "C0123456789"
}#### Delete File
POST /slack/api/files.delete
Content-Type: application/json
{
"file": "F0123456789"
}#### Get File Info
GET /slack/api/files.info?file=F0123456789---
Search
#### Search Messages
GET /slack/api/search.messages?query=keyword---
Code Examples
JavaScript
const response = await fetch('https://gateway.maton.ai/slack/api/chat.postMessage', {
method: 'POST',
headers: {
'Content-Type': 'application/json',
'Authorization': `Bearer ${process.env.MATON_API_KEY}`
},
body: JSON.stringify({ channel: 'C0123456', text: 'Hello!' })
});
const result = await response.json();
console.log(result);Python
import os
import requests
response = requests.post(
'https://gateway.maton.ai/slack/api/chat.postMessage',
headers={'Authorization': f'Bearer {os.environ["MATON_API_KEY"]}'},
json={'channel': 'C0123456', 'text': 'Hello!'}
)
print(response.json())---
Notes
Shell Notes
Error Handling
| Status | Meaning |
|--------|---------|
| 400 | Missing Slack connection |
| 401 | Invalid or missing Maton API key |
| 429 | Rate limited (10 req/sec per account) |
| 4xx/5xx | Passthrough error from Slack API |
**Missing Scope Errors:** If you encounter `missing_scope` errors, contact [Maton Support](mailto:support@maton.ai) to request additional scopes for your connection.
Troubleshooting: API Key Issues
1. Check that the `MATON_API_KEY` environment variable is set:
echo $MATON_API_KEY2. Verify the API key is valid by listing connections:
python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://ctrl.maton.ai/connections')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOFTroubleshooting: Invalid App Name
1. Ensure your URL path starts with `slack`. For example:
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